A Local Magnitude Scale for Southern Italy

FESTA, GAETANO (2009) A Local Magnitude Scale for Southern Italy. [Pubblicazione su rivista scientifica]

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URL: http://www.bssaonline.org/cgi/content/abstract/99/4/2461


local magnitude scale has been defined for southern Italy, in the area monitored by the recently installed Irpinia Seismic Network. Waveforms recorded from more than 100 events of small magnitude are processed to extract synthetic Wood–Anderson traces. Assuming a general description of peak-displacement scaling with the distance, by means of linear and logarithmic contributions, a global exploration of the parameter space is performed by a grid-search method with the aim of investigating the correlation between the two decay contributions and seeking for a physical solution of the problem. Assuming an L2 norm, we found M=logA+1.79 log R - 0.58 yielding an error on the single estimation smaller than 0.2, at least when the hypocenter location is accurate. Station corrections are investigated through the station residuals, referring to the average value of the magnitude. Using a z test, we found that some stations exhibit a correction term significantly different from 0. The use of the peak acceleration and peak velocity as indicators of the magnitude is also investigated.

Tipologia di documento:Pubblicazione su rivista scientifica
Parole chiave:Sismologia, reti sismiche, analisi dati
Settori scientifico-disciplinari MIUR:Non specificato
Stato del full text:Accessibilità ristretta
Altri Autori:A. Bobbio, M. Vassallo, G. Festa
Numero di pagine:10
Intervallo di pagina:pp. 2461-2479
Dipartimento o Struttura:Dipartimento di Scienze Fisiche
Numero identificativo:10.1785/0120080364
Numero di sistema:7533
Depositato il:21 Ottobre 2010 08:57
Ultima modifica:21 Ottobre 2010 08:57

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